Dell D2216H Руководство пользователя - Страница 15

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1. Features

TROUBLESHOOTING

Problem & Question

Power LED is not on

No Plug & Play

Picture is fuzzy

Picture bounces or a wave pattern

is present in the picture

The power LED is ON (blue) but

there is no video or no picture�

Missing one of the primary colors

(RED, GREEN, or BLUE)

Screen image is not centered or

sized properly�

Picture has color defects (white

does not look white)

Poor brightness or contrast

Horizontal or vertical disturbances

on the screen

CLOCK (pixel frequency) controls the number of pixels scanned by one horizontal

sweep� If the frequency is not correct, the screen shows vertical stripes and the picture

does not have correct width�

PHASE adjusts the phase of the pixel clock signal� With a wrong phase adjustment the

picture has horizontal disturbances in light picture�

For PHASE and CLOCK adjustment best to use "dot-pattern"�

• Check if the Power Switch is in the ON position�

• Power Cord should be connected�

• Check if the PC system is Plug & Play compatible�

• Check if the Video Card is Plug & Play compatible�

• Check if the D-15 plug pin of Video Cable is bent�

• Adjust the Contrast and Brightness Controls�

• Move electrical devices that may cause electrical

interference�

• Computer Power Switch should be in the ON position�

• Computer Video Card should be snugly seated in its

slot�

• Make sure monitor's video cable is properly connected

to the computer�

• Inspect monitor's video cable and make sure none of

the pins are bent�

• Make sure computer is operational by pressing the

CAPS LOCK key on the keyboard while observing the

CAPS LOCK LED� The LED should either turn ON or

OFF after pressing the CAPS LOCK key�

• Inspect the monitor's video cable and make sure that

none of the pins are bent�

• Adjust pixel frequency (CLOCK) and PHASE or press

hot-key (auto adjustment)�

• Adjust RGB color or select color temperature�

• When the brightness of the screen lowers after being

used for a certain period and the function of the display

is affected, send it to our authorized service center for

repair�

• Adjust CLOCK and PHASE or perform hot- key (auto

adjustment)�

Possible Solution